feat(itim): Add Service base serializer

ref: #248 #354

app/itim/serializers/service.py

@@ -0,0 +1,32 @@
+from rest_framework.reverse import reverse
+from rest_framework import serializers
+
+from access.serializers.organization import OrganizationBaseSerializer
+
+from itim.models.services import Service
+
+
+
+class ServiceBaseSerializer(serializers.ModelSerializer):
+
+    display_name = serializers.SerializerMethodField('get_display_name')
+
+    def get_display_name(self, item):
+
+        return str( item )
+
+    class Meta:
+
+        model = Service
+
+        fields = [
+            'id',
+            'display_name',
+            'name',
+        ]
+
+        read_only_fields = [
+            'id',
+            'display_name',
+            'name',
+        ]